The erection specification for steel pipe scaffolding includes the material and specification requirements for the steel pipe, the material and specification requirements for the fastener, the material and specification requirements for the scaffolding, and the installation requirements for the safety net. Let's take a look at concrete scaffolding setup specifications .
What are the specifications for the erection of steel pipe scaffolds?
1, steel pipe material and specifications
Generally adopts A3 steel that meets the technical requirements of GBT00 "Conventional Carbon Structure Technical Specifications". It is flat, smooth, crack-free, stratified, and distorted. The steel pipe with hole section and corrosion degree less than 0.5mm must have the manufacturer's Product inspection certificate or quality assurance certificate of the rental unit.
All fasteners should be preferentially adopted outside diameter 48mm, wall thickness of 3-3.5mm welded steel pipe for the pole, the length of the steel pipe of the large crossbar and slant to 4-4.5m is suitable for small crossbar steel pipe length 2.1-2.3m is appropriate.
2, the fastener material and specifications
Fasteners are specially used to connect steel pipe scaffolds. They have the same forms of turning right angles (cross) and butt joints (one word). The fasteners should be made of malleable cast iron. The technical requirements should comply with GB15831 "Steel Pipe Scaffolding". “Fasteners†stipulates that the use of fasteners such as deformation, cracks, oil strands, and sand eyes should not be allowed to pull along the axial direction; right angle fasteners are not allowed to withstand the torque in the cross-axis direction; the docking fasteners are not suitable to withstand tensile forces when used. For vertical nodes, only pressure is allowed. The fastening torque of fastener bolts should be controlled between 40-50nm. Use right-angle and rotary fasteners. When fastening, the end of the steel pipe should extend beyond the edge of the fastener cover. Not less than 100mm, when the fastener clamps the steel pipe, the minimum distance at the opening shall not be less than 5mm, and the clearance between the two ends of the rotary fastener shall be less than 1mm.
3, scaffolding material and specifications
The wooden scaffolding should use pine or pine wood with a thickness of not less than 50mm. The width should be 200-300mm. The end should also be tied with 10-14 galvanized iron wire to prevent cracking. It must not use decay, insects, distortion, cracking and Large transversal planks.
Bamboo scaffolding can be divided into bamboo scaffolding scaffolding and bamboo scaffolding. Bamboo scaffolding scaffolding is made by weaving bamboo strips that are often young and flat. Each bamboo strip is not less than 30 mm in width, and the thickness is less than 8 mm. The intersection of the vertical and horizontal ribs at the opposite side of a positive edge is fastened with iron wire. The length of the board is generally 2-2.5mm and the width is 0.8-1.2m. The bamboo scaffold board is formed by pulling and connecting the standing bamboo sheets with bolts. Bolt diameter 8-10mm, spacing 500-600mm, the first bolt from the end of the board 200-250mm, the board length is generally 2-2.5mm, width is 250mm, the board thickness is generally not less than 50mm. Where insects are cricket, sticky, loose Bamboo scaffolding boards must not be used.
4, the safety net installation requirements
(1) The width of the flat net shall not be less than 3m, the height of the vertical net shall not be less than 1.2m, and the weight of each net shall not exceed 15kg.
(2) At the time of installation, at each knot, the side rope shall be tightly supported by the support (frame) and pulled by an independent tether. The knots shall be distributed along the edges of the net, and the distance shall not be greater than 75cm. The knots should conform to the convenience of knotting, the firmness of the connection and the ease of dismantling, and the principle of disengagement after stress.
(3) Observe the following rules when installing flat screens.
a, installation of flat net should be parallel with the horizontal plane or outside the high and low, generally 15 ã‚š is appropriate.
b. The net load height generally does not exceed 6m (including 6m) due to construction needs. Allowed more than 6m, but the maximum must not exceed 10m, and must be attached to the rope buffer and so on. Safety measures When the load is less than 5m (including 5m), the net should extend at least 2.5m from the building (or at the edge of the work site). When the load height is 5m or more and 10m, it should extend at least 3m.
c. When the net is installed, it is not suitable for tension. It is recommended that the width of the net is 3m and 4m. After the installation, the width horizontal projections are 2.5m and 3.5m, respectively.
d. The minimum distance between the net and the surface of the object below shall not be less than 3m.
Conclusion: construction safety can not be ignored, scaffolding safety of construction workers and the safety of passers-by, so be careful when installing, can not tolerate the slightest negligence. The above specification about the erection of steel pipe scaffolding is briefly introduced here and I hope to help you. For more information, please visit this website. Stay tuned.
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